Approximately 40,000 years ago, a large asteroid impact occurred in Alaska. This event scattered fragments of platinum rich rock across wide swaths of terrain with then became buried in sediments in woolly mammoth and bison skulls. The possible origin of this event is Sithylemenkat Lake.
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Note: The information in this video's description on an impact event occurring in Alaska (other than the age which is estimated by GeologyHub, and is placed in the 11,000-46,000 year old figure mentioned in the paper about to be referenced) was sourced from a paper by Hagstrum, J.T., Firestone, R.B., West, A. et al. Impact-related microspherules in Late Pleistocene Alaskan and Yukon “muck” deposits signify recurrent episodes of catastrophic emplacement. Sci Rep 7, 16620 (2017). doi.org/10.103..., CC BY 4.0. This paper merely suggests that one or more impacts occurred in that timespan and became emplaced on bison and woolly mammoth skulls. The paper does not suggest an impact source, as this source is hypothesized by GeologyHub to be Sithylemenkat Lake who also estimates its age.
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Sources/Citations:
[1] Hagstrum, J.T., Firestone, R.B., West, A. et al. Impact-related microspherules in Late Pleistocene Alaskan and Yukon “muck” deposits signify recurrent episodes of catastrophic emplacement. Sci Rep 7, 16620 (2017). doi.org/10.103..., CC BY 4.0
[2] G. Collins & others, "A numerical assessment of simple airblast models of impact...", Meteoritics & Planetary Science, doi.org/10.111... (2017), CC BY 4.0
Estimates on asteroid diameter, velocity, tnt energy equivalent, and effects from the impact in this video were sourced using data from impact.ese.ic...., which was used with permission.
Негізгі бет The Impact Crater in Alaska; Sithylemenkat Lake
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